var _shoretelChat = new Object({
	// Persons name (Can only have 1 name)
	name:"",

	// Array of all active chat windows
	chatWindows:[],

	// Chrome Objects
	chromeLoaded:false,
	chatArea:undefined,
	chatBar:undefined,

	// Asynchronous Communication Object
	checkXHR:false,

	// Utility Functions used by ALL chat objects	
	startListening:function (obj,evnt,func) {
		if (obj.addEventListener) {
			obj.addEventListener(evnt,func,false);
		} else if (obj.attachEvent) {
			obj.attachEvent("on" + evnt,func);
		}
	},
	getXHR:function () {
		if (typeof XMLHttpRequest != 'undefined') {
			try {return new XMLHttpRequest()}
			catch(e) {return false}
		} else if (typeof ActiveXObject != 'undefined') {
			try {return new ActiveXObject("Msxml2.XMLHTTP")}
			catch(e) {
				try {return new ActiveXObject("Microsoft.XMLHTTP")}
				catch(e) {return false}
			}
		} else {
			return false;
		}
	},
	getShoretelCCChat:function (id) {
		var g = this;
		if (id > -1 || id == "new") {
			if (!g.chatWindows[id]) {
				if (g.chatWindows["new"]) {
					g.chatWindows["new"].id = id;
					g.chatWindows[id] = g.chatWindows["new"];
					delete g.chatWindows["new"];
				} else {
					g.chatWindows[id] = new g.shoretelCCChat(id);
				}
			}
			return g.chatWindows[id];
		} else {
			// Full disconnect, empty array
			g.chatWindows = new Array();
			return false;
		}
	},
	init:function () {
		var g = _shoretelChat;
		if (0 > 0) {
			g.name = "";
			
		} else if (document.getElementById("shoretelCCChatArea")) {
			g.getShoretelCCChat("new").init();
		} else if (document.getElementById("shoretelCCLink")) {
			var shoreLink = document.getElementById("shoretelCCLink");
			shoreLink.innerHTML = "Live Chat";
			g.startListening(shoreLink, "click", g.startNewConversation);
		}
	},
	initChrome:function () {
		var g = this;
		if (!g.chromeLoaded) {
			if (!(g.chatArea = document.getElementById("shoretelCCChatArea"))) {
				g.chatArea = document.createElement("div");
				g.chatArea.id = "shoretelCCChatArea";
				document.getElementsByTagName("body")[0].appendChild(g.chatArea);
			}
		
			g.chatBar = document.createElement("div");
			g.chatBar.id = "shoretelCCChatBar";
			g.chatArea.appendChild(g.chatBar);

			var chatBarPowered = document.createElement("div");
			chatBarPowered.id = "shoretelCCChatBarPowered";
			chatBarPowered.appendChild(document.createTextNode("Powered By: ShoreTel"));
			g.chatBar.appendChild(chatBarPowered);

			g.chromeLoaded = true;
		}
	},
	minimizeAll:function () {
		var g = _shoretelChat;
		for (var i in g.chatWindows) {
			g.chatWindows[i].chatWindow.style.display = "none";
			g.chatWindows[i].chatBarNotify.className = "shoretelCCChatBarNotify closed";
		}
	},
	startNewConversation:function (evnt) {
		var g = _shoretelChat;
		g.getShoretelCCChat("new").init();

		if (evnt && evnt.preventDefault != undefined) evnt.preventDefault();
		return false;
	},

	// The prototype Chat object
	shoretelCCChat:function (id) {
		var a = this, g = _shoretelChat;
		a.id = id;
		a.status = "Loading...";
		a.lastTalker = "";

		// Display (Page) Elements
		var uiLoaded;
		a.chatWindow="";
		a.chatWindowBar="";
		a.chatForm="";
		a.chatText="";
		a.enterMessage="";
		a.sendMessage="";
		a.chatBarNotify="";

		// Communications Objects
		var sendXHR;

		// Internal Status Variables
		var meTyping = false;
		
		a.init = function () {
			g.initChrome();
			if (!uiLoaded) {
				a.chatWindow = document.createElement("div");
				a.chatWindow.className = "shoretelCCChatWindow";
				a.chatWindow.style.display = "none";
				g.chatArea.insertBefore(a.chatWindow,g.chatBar);

				a.chatBarNotify = document.createElement("div");
				a.chatBarNotify.className = "shoretelCCChatBarNotify";
				a.chatBarNotify.innerHTML = a.status;
				g.startListening(a.chatBarNotify, "click", toggleChatWindow);
				g.chatBar.appendChild(a.chatBarNotify);

				a.chatWindowBar = document.createElement("div");
				a.chatWindowBar.className = "shoretelCCChatWindowBar";
				a.chatWindow.appendChild(a.chatWindowBar);

				a.chatForm = document.createElement("form");
				a.chatForm.className = "shoretelCCChatWindowForm";
				g.startListening(a.chatForm, "submit", submitForm);
				a.chatWindow.appendChild(a.chatForm);

				uiLoaded = true;
			}
			if (g.name) {
				showChatBox();
				sendMessage("reload","");
			} else {
				showNewChatForm();
			}
			toggleChatWindow();
		};
		a.sendTyping = function (evnt) {
			var e = (evnt.srcElement) ? evnt.srcElement : this;
			if (!meTyping) {
				sendMessage("typing", "typing");
				meTyping = true;
			}
		};

		// UI / Display Functions
		function showNewChatForm () {
			if (uiLoaded) {
				a.chatForm.innerHTML = "";
				a.chatText = undefined;

				var p = document.createElement("p");
				p.appendChild(document.createTextNode("Please enter your name"));
				a.chatForm.appendChild(p);

				var enterName = document.createElement("input");
				enterName.name = "userName";
				enterName.type = "text";
				enterName.className = "text";
				enterName.value = "";
				a.chatForm.appendChild(enterName);

				var enterSR = document.createElement("input");
				enterSR.name = "srNum";
				enterSR.type = "hidden";
				enterSR.value = window.shoretelSRNumber;
				a.chatForm.appendChild(enterSR);

				var submitName = document.createElement("input");
				submitName.type = "submit";
				submitName.value = "Start Chat";
				submitName.style.clear = "both";
				a.chatForm.appendChild(submitName);

				a.status = "Ready";
				a.chatBarNotify.innerHTML = a.status;
			}
		}
		function showChatBox () {
			if (uiLoaded) {
				var chatWindowClose = document.createElement("div");
				chatWindowClose.className = "shoretelCCChatWindowBarClose";
				chatWindowClose.appendChild(document.createTextNode("X"));
				g.startListening(chatWindowClose, "click", endConversation);
				a.chatWindowBar.appendChild(chatWindowClose);

				var chatWindowMinimize = document.createElement("div");
				chatWindowMinimize.className = "shoretelCCChatWindowBarMinimize";
				chatWindowMinimize.appendChild(document.createTextNode("_"));
				g.startListening(chatWindowMinimize, "click", toggleChatWindow);
				a.chatWindowBar.appendChild(chatWindowMinimize);

				a.chatWindowBar.appendChild(document.createTextNode("Live Chat"));

				a.chatForm.innerHTML = "";
				a.chatText = document.createElement("dl");
				a.chatText.className = "shoretelCCChatWindowChatText";
				a.chatForm.appendChild(a.chatText);
			}
		}
		function toggleChatWindow () {
			if (a.chatWindow.style.display != "none") {
				a.chatWindow.style.display = "none";
				a.chatBarNotify.className = "shoretelCCChatBarNotify closed";
			} else {
				g.minimizeAll();
				a.chatWindow.style.display = "block";
				a.chatBarNotify.className = "shoretelCCChatBarNotify";
			}
		}
		function endConversation (evnt) {
			var e = (evnt.srcElement) ? evnt.srcElement : this;
			if (a.status != "Disconnected" && confirm("Do you want to end your chat session?")) {
				sendMessage("disconnect", "");
			}
			g.chatArea.removeChild(a.chatWindow);
			g.chatBar.removeChild(a.chatBarNotify);
		}

		// Input Handler
		function submitForm (evnt) {
			var e = (evnt.srcElement) ? evnt.srcElement : this;

			if (g.name) {
				sendMessage("message", encodeURIComponent(e.elements[0].value));
				meTyping = false;
				e.elements[0].value = "";
				e.elements[0].focus();
			} else {
				if (e.elements[0].value) {
					g.name = e.elements[0].value;
					var sr = e.elements[1].value;
					a.chatBarNotify.innerHTML = "Connecting...";
					showChatBox();
					sendMessage("new", sr);
				} else {
					alert("Please enter your name");
					e.elements[0].focus();
				}
			}
			if (evnt.preventDefault != undefined) evnt.preventDefault();
			return false;
		};

		// Communications Functions
		function sendMessage (type, txt) {
			if (!sendXHR) sendXHR = g.getXHR();
			if (sendXHR) {
				sendXHR.open("POST", "/chat/shoretelCCChat.php?rand=" + (new Date().getTime()), true);
				sendXHR.onreadystatechange = receiveSend;
				sendXHR.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
				sendXHR.send("id=" + a.id + "&type=" + type + "&txt=" + txt + "&name=" + g.name);
			}
		}
		function receiveSend () {
			if (sendXHR.readyState == 4) {
				g.parseMessage(sendXHR.responseText);
				g.checkMessages();
			} else {
				return false;
			}
		}
	},

	// Heartbeat function for all chat windows
	checkMessages:function () {
		var g = this;
		if (!g.checkXHR) g.checkXHR = g.getXHR();
		if (g.checkXHR && (g.checkXHR.readyState == 0 || g.checkXHR.readyState == 4)) {
			g.checkXHR.open("POST", "/chat/shoretelCCChat.php?rand=" + (new Date().getTime()), true);
			g.checkXHR.onreadystatechange = g.receiveCheck;
			g.checkXHR.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
			g.checkXHR.send("type=hb");
		}
	},
	receiveCheck:function () {
		var g = _shoretelChat;
		if (g.checkXHR.readyState == 4) {
			g.parseMessage(g.checkXHR.responseText);
			if (g.chatWindows.length > 0) g.checkMessages();
		} else {
			return false;
		}
	},
	parseMessage:function (msg) {
		var g = this;
		if (msg) {
			try { var incoming = eval(msg); } catch (e) {}

			var textFragments = new Array();

			for (var i = 0; i < incoming.length; i++) {
				if (typeof(incoming[i][0]) != "undefined") {
					var id = incoming[i][0];
					if (id == "-2") g.chatWindows[-2] = g.chatWindows.shift();

					var cw = g.getShoretelCCChat(id);
					if (cw) {
						if (!textFragments[id]) textFragments[id] = document.createDocumentFragment();

						var message = incoming[i][1];
						if (message.type == "new user reply") {
							cw.enterMessage = document.createElement("input");
							cw.enterMessage.type = "text";
							cw.enterMessage.name = "txt";
							cw.enterMessage.className = "text";
							cw.chatForm.appendChild(cw.enterMessage);
							cw.enterMessage.focus();
							g.startListening(cw.enterMessage, "keypress", cw.sendTyping);

							cw.submitName = document.createElement("input");
							cw.submitName.type = "submit";
							cw.submitName.value = "Send";
							cw.chatForm.appendChild(cw.submitName);

							var dt = document.createElement("dt");
							dt.appendChild(document.createTextNode(message.text));
							textFragments[id].appendChild(dt);

							cw.status = "Waiting for Agent...";
							cw.chatBarNotify.innerHTML = cw.status;
						} else if (message.type == "string") {
							if (cw.lastTalker != message.from) {
								var dt = document.createElement("dt");
								dt.className = (message.from == g.name) ? "shoretelCCMe" : "shoretelCCOthers";
								dt.appendChild(document.createTextNode(message.from));
								textFragments[id].appendChild(dt);
							}

							var dd = document.createElement("dd");
							dd.appendChild(document.createTextNode(message.text));
							textFragments[id].appendChild(dd);

							if (cw.chatWindow.style.display == "none") a.chatBarNotify.className = "alert";

							cw.chatBarNotify.innerHTML = cw.status;
							cw.lastTalker = message.from;

						} else if (message.type == "agent connect") {
							var dt = document.createElement("dt");
							dt.appendChild(document.createTextNode(message.text));
							textFragments[id].appendChild(dt);

							cw.status = "Connected";
							cw.chatBarNotify.innerHTML = cw.status;
							cw.lastTalker = "";

						} else if (message.type == "typing") {
							if (message.properties.typingStatus == "typing") {
								cw.chatBarNotify.innerHTML = message.from + " is typing";
							} else {
								cw.chatBarNotify.innerHTML = cw.status;
							}

						} else if (message.type == "system string") {
							var dt = document.createElement("dt");
							dt.appendChild(document.createTextNode(message.text));
							textFragments[id].appendChild(dt);

							cw.lastTalker = "";

						} else if (message.type == "disconnect") {
							var dt = document.createElement("dt");
							dt.appendChild(document.createTextNode(message.text));
							textFragments[id].appendChild(dt);

							cw.lastTalker = "";

							if (message.properties) {
								cw.chatForm.removeChild(cw.enterMessage);
								cw.chatForm.removeChild(cw.submitName);
								cw.status = "Disconnected";
								cw.chatBarNotify.innerHTML = cw.status;
							}
						}
					}
				}
			}
			for (var i in textFragments) {
				var chatText = g.getShoretelCCChat(i).chatText;
				chatText.appendChild(textFragments[i]);
				chatText.scrollTop = chatText.scrollHeight;
			}
		}
	}
});
_shoretelChat.startListening(window,"load", _shoretelChat.init);